Dialysis catheter system
First Claim
1. A dual-lumen, reverse-flow catheter comprising an arterial lumen having an inner surface, an outer surface, a distal end, and a proximal end;
- and a venous lumen having an inner surface, an outer surface, a distal end, and a proximal end, wherein the distal end of the arterial lumen extends beyond the distal end of the venous lumen, wherein the distal end of the arterial lumen comprises one aperture and the distal end of the venous lumen comprises at least one aperture.
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Abstract
The present invention provides a dialysis catheter that is designed to function in reverse-flow, having a dual lumen configuration. An embodiment of the present invention includes two lumen cooperatively configured in a co-axial design. The arterial lumen is circular or oval and extends beyond the termination of the venous lumen. The arterial lumen extracts the blood from the blood vessel for hemodialysis treatment. The venous lumen is also circular or oval. Terminating at a proximal point to the distal end of the arterial lumen, this configuration of the venous lumen aids in preventing recirculation. The venous lumen returns dialyzed blood back into the patient. The venous lumen can further include a plurality of apertures to aid in reducing the risk of fibrin sheath growth. In a method of use, the arterial lumen of the invention preferably resides within the right atrium with the venous lumen positioned within the superior vena cava.
118 Citations
35 Claims
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1. A dual-lumen, reverse-flow catheter comprising an arterial lumen having an inner surface, an outer surface, a distal end, and a proximal end;
- and a venous lumen having an inner surface, an outer surface, a distal end, and a proximal end, wherein the distal end of the arterial lumen extends beyond the distal end of the venous lumen, wherein the distal end of the arterial lumen comprises one aperture and the distal end of the venous lumen comprises at least one aperture.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for treating blood, said method comprising the steps of:
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a) making an incision to a blood vessel; and
b) inserting into the blood vessel, in the direction of blood flow, a dual-lumen, reverse-flow catheter comprising an arterial lumen having an inner surface, an outer surface, a distal end, and a proximal end; and
a venous lumen having an inner surface, an outer surface, a distal end, and a proximal end, wherein the distal end of the arterial lumen extends beyond the distal end of the venous lumen, wherein the distal end of the arterial lumen comprises one aperture and the distal end of the venous lumen comprises at least one aperture, wherein blood from the blood vessel is drawn through the aperture at the distal end of the arterial lumen;
c) treating the drawn blood; and
d) returning the treated blood to the blood vessel through the at least one aperture at the distal end of the venous lumen. - View Dependent Claims (32, 33, 34, 35)
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Specification